October 8, 2015
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Definition of Asthenia

Asthenia: Weakness. Lack of energy and strength. Loss of strength. Myasthenia refers to a loss of muscle strength, as in myasthenia gravis.

Asthenia is from the Greek asthenes, from a- (without) + sthenos (strength).

Source: MedTerms™ Medical Dictionary
Last Editorial Review: 9/20/2012

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